Update error

[carlo.carlesi@isti.cnr.it]

Hit http://security.debian.org etch/updates/contrib Sources
Get:3 http://security.debian.org etch/updates/main Packages [431kB]
99% [3 Packages gzip 0]
gzip: stdin: not in gzip format
Err http://security.debian.org etch/updates/main Packages
  Sub-process gzip returned an error code (1)
Fetched 3B in 1s (3B/s)
Failed to fetch
http://security.debian.org/dists/etch/updates/main/binary-amd64/Packages.gz
 Sub-process gzip returned an error code (1)
Reading package lists... Done


====
system:
Linux webarea 2.6.18-6-amd64 #1 SMP Tue May 5 08:01:28 UTC 2009 x86_64
GNU/Linux

 cat cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            5110  @ 1.60GHz
stepping        : 11
cpu MHz         : 1595.930
cache size      : 4096 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
.........